Alert archive / South Dakota / Todd County
Weather alerts in Todd County, South Dakota, 2010
139 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Todd County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 139
- Warnings
- 39
- Watches
- 31
- Advisories
- 32
- Busiest month
- June28 alerts
- Busiest day
- May 24, 201011 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Todd County in 2010 had a tornado report inside them.
Todd County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 28 | 26 | 7% | 19 | 89% | 27 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 22 | 4 | 82% | 11 | 45% | 20 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 323 | 259 | 20% | 520 | 90% | 27 min |
| NWS Rapid City, SD: flash flood warnings | 9 | 5 | 44% | 22 | 95% | 110 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 5, 4:37 AM CST | Winter Weather Advisory | UNR | 41 hr |
| Jan 6, 10:10 AM CST | Winter Storm Warning | UNR | 11 hr |
| Jan 6, 9:31 PM CST | Winter Weather Advisory | UNR | 4 hr |
| Jan 7, 1:04 AM CST | Wind Chill Warning | UNR | 34 hr |
| Jan 20, 2:35 PM CST | Winter Storm Watch | UNR | 61 hr |
| Jan 20, 6:26 PM CST | Dense Fog Advisory | UNR | 35 hr |
| Jan 21, 2:40 PM CST | Winter Weather Advisory | UNR | 32 hr |
| Jan 23, 3:53 AM CST | Winter Weather Advisory | UNR | 62 hr |
| Jan 24, 3:01 AM CST | Wind Advisory | UNR | 39 hr |
| Feb 3, 3:45 PM CST | Winter Weather Advisory | UNR | 47 hr |
| Feb 7, 4:58 AM CST | Wind Chill Advisory | UNR | 46 hr |
| Feb 12, 3:34 PM CST | Winter Weather Advisory | UNR | 44 hr |
| Mar 2, 7:03 PM CST | Dense Fog Advisory | UNR | 41 hr |
| Mar 5, 4:43 AM CST | Winter Weather Advisory | UNR | 31 hr |
| Mar 7, 9:44 PM CST | Dense Fog Advisory | UNR | 37 hr |
| Mar 9, 10:12 AM CST | Areal Flood Advisory | UNR | 50 hr |
| Mar 11, 11:59 AM CST | Winter Weather Advisory | UNR | 24 hr |
| Apr 12, 7:09 PM CDT | Wind Advisory | UNR | 25 hr |
| Apr 13, 12:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 13, 3:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 13, 5:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 23, 5:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 28, 3:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 29, 3:23 PM CDT | Wind Advisory | UNR | 52 hr |
| May 3, 4:24 AM CDT | High Wind Watch | UNR | 24 hr |
| May 4, 3:54 AM CDT | Wind Advisory | UNR | 16 hr |
| May 5, 12:56 AM CDT | Wind Advisory | UNR | 12 hr |
| May 7, 1:00 PM CDT | Wind Advisory | UNR | 6 hr |
| May 7, 3:27 PM CDT | Freeze Warning | UNR | 18 hr |
| May 22, 8:05 PM CDT | Severe Thunderstorm Warning | UNR | 55 min |
| May 22, 8:31 PM CDT | Tornado Warning | UNR | 44 min |
| May 23, 4:13 PM CDT | Flood Watch | UNR | 29 hr |
| May 23, 4:30 PM CDT | High Wind Watch | UNR | 12 hr |
| May 23, 10:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 23, 11:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 23, 11:49 PM CDT | Severe Thunderstorm Warning | UNR | 26 min |
| May 24, 4:49 AM CDT | High Wind Warning | UNR | 17 hr |
| May 24, 6:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| May 24, 11:55 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 24, 12:21 PM CDT | Tornado Watch | SPC | 9 hr |
| May 24, 3:31 PM CDT | Severe Thunderstorm Warning | UNR | 59 min |
| May 24, 3:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 24, 6:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 24, 6:52 PM CDT | Severe Thunderstorm Warning | UNR | 68 min |
| May 27, 4:10 AM CDT | Wind Advisory | UNR | 12 hr |
| May 29, 1:40 PM CDT | Flash Flood Watch | UNR | 14 hr |
| May 29, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 29, 6:38 PM CDT | Severe Thunderstorm Warning | UNR | 67 min |
| May 29, 7:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 1, 8:21 AM CDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 1, 8:36 AM CDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 1, 8:58 AM CDT | Areal Flood Advisory | UNR | 4 hr |
| Jun 9, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 9, 11:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 10, 1:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 3:13 AM CDT | Flood Watch | UNR | 61 hr |
| Jun 10, 7:01 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 10, 8:26 PM CDT | Severe Thunderstorm Warning | UNR | 41 min |
| Jun 10, 9:00 PM CDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 10, 10:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 16, 12:19 PM CDT | Wind Advisory | UNR | 31 hr |
| Jun 16, 5:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 16, 10:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 19, 10:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 19, 10:39 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 20, 7:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 5:03 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 22, 6:24 PM CDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 22, 7:07 PM CDT | Tornado Warning | UNR | 38 min |
| Jun 22, 7:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 7:27 PM CDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jun 22, 7:40 PM CDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jun 22, 7:57 PM CDT | Areal Flood Advisory | UNR | 6 hr |
| Jun 22, 8:29 PM CDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jun 26, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 5:51 PM CDT | Severe Thunderstorm Warning | UNR | 69 min |
| Jun 26, 5:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 3, 3:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 5:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 3, 5:57 PM CDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jul 3, 6:51 PM CDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 3, 7:37 PM CDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 6, 1:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 6, 2:23 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 6, 5:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 6, 8:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 10, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 10, 5:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 18, 7:21 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 5:35 PM CDT | Severe Thunderstorm Warning | UNR | 70 min |
| Jul 19, 6:05 PM CDT | Tornado Warning | UNR | 25 min |
| Jul 19, 6:45 PM CDT | Severe Thunderstorm Warning | UNR | 32 min |
| Jul 19, 7:03 PM CDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jul 19, 7:37 PM CDT | Severe Thunderstorm Warning | UNR | 83 min |
| Jul 19, 8:27 PM CDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jul 21, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 10:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 29, 3:05 AM CDT | Flash Flood Watch | UNR | 19 hr |
| Jul 29, 2:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 29, 3:30 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 29, 4:56 PM CDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jul 29, 6:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 29, 9:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Aug 1, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 1, 5:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 1, 8:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 2, 5:16 PM CDT | Severe Thunderstorm Warning | UNR | 36 min |
| Aug 3, 3:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 3, 3:37 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 3, 4:38 PM CDT | Areal Flood Advisory | UNR | 5 hr |
| Aug 3, 5:24 PM CDT | Severe Thunderstorm Warning | UNR | 96 min |
| Aug 3, 5:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 6:39 PM CDT | Severe Thunderstorm Warning | UNR | 66 min |
| Aug 22, 4:30 AM CDT | Wind Advisory | UNR | 18 hr |
| Aug 30, 2:45 PM CDT | Mesoscale Discussion | SPC | 30 min |
| Sep 1, 3:48 PM CDT | Wind Advisory | UNR | 27 hr |
| Sep 5, 2:48 PM CDT | Wind Advisory | UNR | 28 hr |
| Sep 14, 5:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Sep 14, 6:22 PM CDT | Tornado Watch | SPC | 4 hr |
| Sep 14, 8:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 14, 9:54 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 14, 11:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Oct 1, 3:32 PM CDT | Frost Advisory | UNR | 18 hr |
| Oct 8, 5:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 8, 6:31 PM CDT | Severe Thunderstorm Warning | UNR | 59 min |
| Oct 8, 7:16 PM CDT | Severe Thunderstorm Warning | UNR | 32 min |
| Oct 9, 2:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 12, 3:19 PM CDT | Freeze Warning | UNR | 19 hr |
| Oct 24, 3:57 PM CDT | High Wind Watch | UNR | 24 hr |
| Oct 25, 3:55 PM CDT | High Wind Warning | UNR | 51 hr |
| Nov 23, 2:37 PM CST | Winter Weather Advisory | UNR | 28 hr |
| Nov 27, 10:10 PM CST | Winter Weather Advisory | UNR | 43 hr |
| Dec 10, 3:54 PM CST | Wind Advisory | UNR | 20 hr |
| Dec 20, 6:27 AM CST | Freezing Rain Advisory | UNR | 4 hr |
| Dec 28, 4:03 PM CST | Winter Storm Watch | UNR | 23 hr |
| Dec 29, 3:07 PM CST | Winter Storm Warning | UNR | 63 hr |
| Dec 31, 6:23 AM CST | Blizzard Warning | UNR | 24 hr |
| Dec 31, 11:22 AM CST | Mesoscale Discussion | SPC | 5 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 28 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 15 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 37 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 4 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 3 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.